I don't think Hayward is going to "save" the Celtics in this series. Every time he's missed a big chunk of time due to an injury, he's been super rusty when he comes back, and it takes him weeks to get back into a rhythm. This happened not just with his major ankle injury, but with his less-severe injuries as well. He might help Boston this series, but not enough to tip the scales, especially if Kemba continues to suck at shooting and Boston can't figure out how to attack traps and zones.